999110221201 has 2 divisors, whose sum is σ = 999110221202. Its totient is φ = 999110221200.

The previous prime is 999110221171. The next prime is 999110221259. The reversal of 999110221201 is 102122011999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 715741380225 + 283368840976 = 846015^2 + 532324^2 .

It is a cyclic number.

It is not a de Polignac number, because 999110221201 - 2¹¹ = 999110219153 is a prime.

It is a super-2 number, since 2×999110221201² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (999110221001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499555110600 + 499555110601.

It is an arithmetic number, because the mean of its divisors is an integer number (499555110601).

Almost surely, 2^999110221201 is an apocalyptic number.

It is an amenable number.

999110221201 is a deficient number, since it is larger than the sum of its proper divisors (1).

999110221201 is an equidigital number, since it uses as much as digits as its factorization.

999110221201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 37.

The spelling of 999110221201 in words is "nine hundred ninety-nine billion, one hundred ten million, two hundred twenty-one thousand, two hundred one".